Crosshead pin ejector



Nov. 29, 1932; c. A. SHAFFER 1,389,135

cnossumn PIN EJECTOR Filed 001;. 9. 1929 2 Sheets-Sheet 1 INVENTOR marlarAJfiafier MI, 29, c A SHAFT-ER CROSSHEAD PIN EJECTOR Filed 001;. 9, 1929 2 Sheets-Sheet :NVENTOR WZQAL ATTO R N EYS Patented Nov. 29, 1932 UNITED STATES.

PATENT OFFICE CHARLES A. SHAIFFER, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE WATSON-STILLMAN 00., OF NEW YOPJL'N. Y., A. CORPORATION OF NEW JERSEY til caossnmn rm EJ'ECTOR Application filed October 9, 1929. Serial No. 398,540.

Important objects of the present invention are, to provide an improved jack device or press designed for lateral operation; to provide a jack device designed particularly for eflicient performance of the work of removing the wrist pin from a locomotive crosshead by endwise pressure upon the pin; to provide such a ack device designed to be conveniently moved to and-from the work, to be readily and accurately adjusted with relationto the work, and to be conveniently and securely attached to a fixed anchorage for resisting reaction and holding the jack in operative position; and to provide in such a device, freely adjustable and readily operable anchoring means adapted for ready connection to fixed anchorages varying in shape, size and position.

Other objects of the invention will appear hereinafter.

In the drawings, of the jack device, operation;

Fig. 2 a plan view Fig. 1 is a side elevation showing it adjusted for of the device showing it operatively connected to the connecting rod and'piston rod of a locomotive;

Fig. 3 a rear view of the device;

Fig. 4 a detail section taken on the line 4-4: of Fig. 1;

Fig. 5 a section through the jack taken on the line 5-5 of Fig. 2;

6 a section taken on Fig 2.; and

Fig. 7 a miniature side view of alocomotlve with the jack device operatively connected thereto for forcing out the wrist pin. Thejack device is a unit which includes a base in the form of a wheeled truck 1. The truck structure comprises a flat metal platform 2 supported by a pair of small rear wheels. 3 and a small front wheel 4. The

the line 66 of wheels 3 are mounted upon anaxle 5 rigidly I secured in any suitable manner to the under side of the platform, and the wheel 4 is rotatable upon an axle 6 mounted in a fork 7. T he fork 7 is vertically swiveled in a bearing bracket 8 secured to the platform, and a forked draught tongue 9 is hinged to the axle 6. Mounted upon the platform 2 is a pedestal comprising a base'plate 10, secured barrel as at 27 and forms a to the platform, and an upstanding tubular section 11 threaded at its lower end and screwed into a threaded opening in plate 10. Thls pedestal forms a support for a hydraulic jack 12 and its mounting, together lVltllil anchoring devices mounted with the ae The jack 12 comprises a body or barrel 13 in which a ram 1 1 is formed with a reduced cylindrical end 15 which projects longitudinally from one end of the barrel 13 and is slightly concave as lndicated at 16. The opposite end of the barrel forms a compression chamber 17 into which fluid is admitted for forcing the ram outward. A port 18 in one side of the compression chamber admits and exhausts the fluid. Formed in the barrel is an annular groove 19 surrounding the ram, and disposed in said groove is suitable packing 20. The jack is disposed and supported with its axis horizontal, for operation of the jack ram in a lateral direction.

A mechanism is provided for retracting the ram and includes a. plate 21 rigidlymounted upon the projecting portion of the ram and formed with a radial arm extending. laterally to a point beyond the outer diameter of the jack barreL, Disposed along the exterior of the barrel is a toothed rack 22 one end of which is bolted as at 23 to the plate 21. A pinion 24 is disposed beneath the rack, meshes therewith and is fixed upon a shor shaft 25. Extending over said rack and pinion is a casing 26 which is secured 'de for the rack and acover for both raci iind pinion. A bearing 28 for the pinion shaft 25 is formed upon said casing, andthe shaft wardly from the bearing and is ormed with a squared end. A shaft-turning member 29 resembling a socket wrench is adapted to detachably engage with the squared end of the shaft for turning the shaft and pinion and thereb shifting the rack 21 to retract the ram a ter an operation of the jack.

The support or mounting cludes a cross beam 30, located at the inner closed end of the jackbarrel 13. The beam and barrel are preferabl formed by a single to the jack 7 projects out- 4 for the jack in- 14 is slidably mounted. Ram Y metal casting, with the barrel extending from a medial point of one edge of the beam and the beam forming two laterally extending cantilever arms 31 at oposite sides of the barrel. Said arms form supports for anchoring devices to be described hereinafter.- At its under side the beam 30 is formed with a boss 32 bored out to form a vertical socket. The beam and the parts supported thereby are mounted upon a post 33 whose upper end is reduced and fitted in said socket. A pin 34 looks the beam' to the socket and prevents relative turning. The lower portion of the post extends for a material length into the tubular pedestal 11, mounted upon the truck, and is fitted for vertical sliding therein but keyed against turning, as indicated at 35. The post is threaded and an adjusting nut 36 is screwed thereon and disposed to abut the upper end of the pedestal l1. Radial han-. dles are provided upon said nut for turning it and thereby vertically adjusting the post and its supported parts.

Mounted and secured upon the truck platform 2, forwardly of the pedestal 11, is a small fluid tank 37 formed with a flat top upon which a pump 38 for operating the jack is mounted and secured. The pump structure includes a casing 39 containing the usual plunger, Valve and conduit means, not shown. An operating lever 40 is connected at one end to a fulcrum link 41 pivoted to the pump casing, and at a point intermediate its ends said lever is pivoted to the plunger rod 42. The free end of the lever carries a permanent short handle 43 and a long handle 44 detachably mounted in a socket 44 formed in the lever 40, said long handle extending laterally beyond one side of the truck. A fluid connection, not shown, leads from the tank 37 to the pump and a bendable pipe 45 leads from the pump outlet 46 to the jack barrel 13 and is connected to the port 18 thereof. At 47 is shown a handle for operating a valve within the pump which controls the return of the fluid to the tank when the jack ram is to be retracted. The pump is of standard form, or substantially so, and illustration of its interior structure is therefore omitted.

The lateral cantilever arms 31 formed by the cross beam 30 serve for the attachment and support of the this purpose each arm is formed with a horizontal slot 48 extending inwardly from its end for most of the lengthof the arm. These slots preferably lie within the horizontal plane of the axis of the jack. In the present case the apparatus is intended particularly for the removal of wrist pins from crossheads of locomotives. Therefore two anchoring devices 49 and 50 of different design are provided. The device 49 is designed for anchoring to the piston rod at one side of the crosshead and is providedwith a single open hook 51 formed to embrace the piston rod and anchoring devices. For

make a good liberal contact with the rod to a shank 56. The remainder of shank 56 is.

of the other anchoring similar to shank 52 device. Hooks 54 are formed to effect a secure anchoring engagement with a connecting rod of standard form hai ingan I-beam cross section. The pivotal connection 55 of the hooks adapts them to swing toward and from each other for opening and closing, and adapts them.both to swing downward when notin use. Said pivoted connection comprises a bolt, nut'and cotter pin, and by tightemngthe nut the hooks may be clamped in an adjusted operative position.

The shanks 52 and 56 are inserted through the beam slots 48 and each is held against endwise withdrawal by a nut 57 and washer 58 upon the. threaded end thereof. The adjacent edge 59 of the beam is straight and forms a suitable abutment for said washers. Through the ends of the beam, headed pins or bolts 60 are vertically inserted to close the outer ends of the slots 48 and prevent the anchoring devices from slipping out of the slots. The design of the anchoring devices and their mounting renders them readily adjustable and universally shiftable. By turning the nuts 57 they may be adjusted longitudinally to vary their reach; they may be adjusted bodily toward and from the jack by shifting their shanks along the beam slots, and may be tilted relatively to the jack by swinging the shanks in the slots. The shanks are also rotatable in the slots for bringing the anchoring devices in proper relation to their anchorages. The two anchoring devices are interchangeably mounted to adapt the jack for connection to either side of a locomotive. Removal of said devices for interchanging them is readily effected by merely withdrawing the pins 60 and slipping the shanks of the devices laterally out of the slots 48. y

In the use of the device for ejecting the wrist pin from a locomotive crosshead the truck 1, with the parts carried thereby, is rolled to operative position adjacent the crosshead. The adjusting nut 36 of the jack support is then turned, if necessary, the jack ram upon a level with the indicated at P mounted in a bore in the crossh ead H. The outer end of said pin usually bears a nut and an oil cup, which are removed. -Having adjusted the jack ram into alinement with the wristpin,

wrist pin the single to bring inward to free it from its socket.

hook of the anchoring device49 is engaged with the piston rod R at one side of the crosshead and the two hooks of the anchoring device are engaged with the connecting rod C at a point adjacent the opposite side of the crosshead, the anchoring devices being readily shiftable and adjustable to effect a secure engagement with their anchorages and to hold the jack in proper relation to the work. By working the pump lever 40 the pump 38 is operated to draw fluid from the tank 37 and force it through'the pipe 45 to the compression chamber of the jack for forcing the ram outward against the end of the wrist pin P. In the preliminary operation for merely bringing the jack ram into contact with the wrist pin the pump may be operated by means of the shorthandle 43. When strong resistance is encountered by the ram the pump is operated by the long handle 44 to exert a powerful pressure for forcing the wrist pin During this powerful thrust the anchoring devices 49 and 50 resist the reaction of the jack and securely hold the latter in operative position. After the wrist pin has been freed the jack device may be readily detached and removed from the locomotive.

Heretofore the removal of wrist pins has been an exceedingly difficult and tedious operation owing to the fact that the pins frequently stick so tightly in the crosshead asto require tons of pressure to free them, and owing to the fact that the meansavailable for performing the operation have been very inadequate. The present device has been designed throughout to facilitate this operatlon' and it forms a compact, readily transportable unit for moving to and from the work. The hydraulic pressure means,-together with the means for directing said pressure and for resisting reaction, enables the device to apply a pressure of many tons with the utmost effectiveness and with perfect safety. At the same time the design of the device avoids a heavy, bulky base structure and makes it light and compact for transportation.

While I have shown and described a very satisfactory form of my invention, I do not wish to be limited strictly to the structure described nor to the use set forth. It is obvious that the jack device is well suited for other work of a similar character. I therefore reserve the right to make such changes in structure and application as will lie within the scope of the claims.

What I claim is:

' 1. A hydraulic jack unit for removing the wrist pin from an engine crosshead, com rising a wheeled truck; a hydraulic jac a .mounting for said'jack carried by the truck and supporting the jack elevated above the truck and disposed for operation in a'lateral direction; manually operable means for adjusting the jack to different elevations; a

pump mounted upon the truck for operating the ack; anchoring means connected to the jack, disposed at one side thereof and formed to anchor to the engine piston rod; and anchoring means connected to the jack disposed at the opposite side thereof and formed to anchor to the engine connecting rod, the ram of the jack being adapted to engage the wrist pin .for forcing it endwise from the cross head, and said anchoring means being adapted to resist the reaction of the jack and hold the latter against =lateral displacement rela tively to the crosshead.

2. A jack device for removing the wrist pin from an engine crosshead, comprising a base; a jack; a mounting for said jack carried by the base and supporting the jack elevated and disposed for operation in a lateral direction;

. means for adjusting the jack to different elevations; means for operating the jack; anchoring means connected to the jack, disposed at one side thereof and formed to anchor to the engine pistonrod: and anchoring means connected to the jack, disposed at the opposite side thereof and formed to anchor to the engine connecting rod, the ram of the jack being adapted to engage the wrist pin for forcing it endwise from the'crosshe'ad, and said anchoring means being adapted-to resist the reaction of the jack and hold the latter against horizontal displacement relatively to the crosshead.

3. A jack device for removing the wrist pin from an engine crosshead, comprising a base; a jack; a mounting for said jack carried by the base and supporting the jack elevated and disposed for operation in a lateral direction; means for adjusting the jack to different elevations; means for operating the jack; anchoring means connected to the jack; disposed at one side thereof and formed to anchor to the engine piston rod; anchoring means connected to the jack, disposed at the opposite side thereof and formed to anchor to the engine connecting rod; and means rendering both of said anchoring means adjustable and universally shiftable to facilitate engagement with their anchorages, the ram of the jack being adapted to engage the wrist pin for forcing it endwise from the crosshead and the anchoring means being adapted to resist the reaction of the jack and hold the latter against displacement relatively to the crosshead.

4. A jack device for removing the wrist pin from an engine crosshead, comprising a jack provided with a ram adapted to engage the wrist pin for forcing the latter endwise; an anchoring device connected to the ack, dis posed at one sidethereof and formed to anchor to the enginepiston rod; an anchoring device connected to the jack, disposed at the opposite side thereof, and formed to anchor to the engine connecting rod; and means rendering said anchoring devices adjustable and shiftable for engagement with their anchorages, said devices being adapted to resist the reaction of the jack andhold it against displacement relatively to the crosshead.

5. A jack device .for removing the wrist pin from anengine crosshead, comprising a jack provided with a ram adapted to engage the wrist pin for forcing the latter endwise; anchoring devices connected to said jack for anchoring to adjacent relatively fixed parts of the engine and adapted to resist the reaction of the jack and hold it against displacement relatively to the crosshead; and means rendering said anchoring devices shiftable and adjustable for proper engagement with their anchorages.

6. A jack device comprising a jack; anchoring devices connected to said jack and adapted to engage fixed anchorages and to resist the reaction of the jack and hold it in place during the operation thereof; and means rendering said devices adjustable and universally shiftable for engagement with their anchorages.

7. A jack device comprising a jack provided with a ram; means supporting said ack for operation of its ram in a lateral direction;

a pair of anchoring devices connected to the jack and adapted to be connected to a fixed anchorage for resisting reaction and holding the jack against displacement when it is operated; means supporting said anchoring devices at .opposite sides of the jack for bodily shifting toward and from the jack laterally thereof, and for lateral swinging with relation to the jack; and adjusting means for varying the reach of the anchoring means.

8. A jack device comprising a jack rovided with a ram; a pair of arms in .Xed relation to the body of the jack, extending laterally from opposite sides thereof and each formed with a slot therealong; a pair of anchoring devices, each formed with a shank disposed in one of said slots for bodily shifting of said devices laterally toward and from the jack and for swinging laterally of the latter; and nuts threaded upon said shanks to form pull connections with said arms and for varying the reach of the anchoring devices,

the anchoring devices being formed to engage fixed anchorages to resist reaction and hold the jack against displacement when it is operated.

9. A hydraulic jack unit for removing the wrist pin from an engine crosshead, com ri'sing a wheeled truck; a hydraulic jacfi; a mounting for said jack carried by the truck and supporting the jack elevated abovethe truck and disposed horizontally for operation in a lateral direction; manually operable means for adjusting the jack to different elevations; a pump mounted upon thetruck for operating the jack; adjustable and removable-hook-shaped anchoring means connected to the jack, disposed at one side thereof and formed to engage the engine piston rod; and adjustable and removable hook-shaped anchoring means connected to the jack disposed at the opposite side thereof and formed to anchor to the engine connecting rod, the ram of the jack being adapted to engage the wrist pin for forcing it horizontally endwise from the crosshead, and said anchoring means being adapted to resist the reaction of the jack and hold the latter against horizontal displacement relatively to the crosshead.

10. A jack device for removing the wrist pin from an engine crosshead, comprising a base; a jack; va mounting for said jack carried by the base and supporting the jack elevated and disposed for operation in a lateral direction; means for operating the jack; and a pair of anchoring devices connected to the jack and interchangeably mounted at opposite sides thereof, one of said devices being formed to anchor to the engine piston rod and the other being formed to anchor to the engine connecting rod, the ram of the jack ,beingadapted to engage the wrist pin for signature.

' CHARLES A. SHAFFER. 

